155 results about "Electron transfer rate" patented technology

The invention provides a silicon-carbon negative electrode material and a preparation method thereof. The preparation method comprises the following steps: a) mixing a phenol monomer, an aldehyde solution, ammonia water and water, dropwise adding a boric acid solution for reaction, and curing to obtain boron-containing phenolic resin; b) carbonizing the boron-containing phenolic resin obtained in the step a), mixing with alkali, and activating to obtain boron-doped porous carbon; and c) carrying out silicon deposition on the boron-doped porous carbon obtained in the step b) by adopting a gaseous silicon source, carrying out carbon coating by adopting a gaseous carbon source, and cooling to obtain the silicon-carbon negative electrode material. Compared with the prior art, the preparation method provided by the invention has the advantages that a conductive network can be formed by doping the boron element, the electron concentration can be improved, the electron transfer rate is favorably improved, the conductivity of the material is effectively enhanced, and the rate capability of the negative electrode material is effectively improved; meanwhile, the residual carbon rate in the porous carbon preparation process can be greatly increased, and the cost of the whole silicon-carbon negative electrode material is effectively reduced.

A bias-free driven ion-based photoelectrochemical wastewater treatment system and method is disclosed. Through an ion-coupled photogenerated electron-assisted photocatalytic oxidation-reduction pathway, the system achieves efficient treatment of high-salinity wastewater. The system employs electron-ion receptor materials as the counter electrode, providing reaction sites to drive the coupling of photogenerated electrons and cation transfer. Additionally, the voltage generated by the system directly drives hole oxidation to produce strong oxidizing free radicals. Furthermore, this ion-based photoelectrochemical system demonstrates excellent degradation performance in high-concentration chloride media. This indicates that, in addition to cations (such as Na+) helping to accelerate the electron transfer rate, the presence of Cl− further enables efficient and sustainable wastewater treatment. The concept proposed in this invention emphasizes the potential for using abundant sodium chloride in seawater as an inexpensive additive for wastewater treatment.

The invention discloses a high-conductivity bridged silicon-carbon composite material as well as a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. The high-conductivity bridged silicon-carbon composite material comprises a core-shell structure with an inner core and an outer shell, the inner core is porous carbon and a carbon nano tube growing on the surface of the porous carbon in situ, and a nano silicon layer is attached to pores and surfaces of the porous carbon and the carbon nano tube; and the shell is a carbon coating layer. According to the high-conductivity bridged silicon-carbon composite material provided by the invention, the carbon nanotubes are grown on the surface of the porous carbon in situ, and contact among particles is similar to bridging, so that a point-line conductive network is formed, the intrinsic conductivity of the composite material is improved, and the electron transfer rate is accelerated. Meanwhile, the carbon nanotubes have extremely high strength and hardness, the mechanical strength of the porous carbon substrate can be remarkably improved by introducing the carbon nanotubes into the porous carbon material, expansion of nano silicon in the charging and discharging process can be better restrained, and the performance of high capacity, high first efficiency, long circulation and high magnification is shown.

The invention discloses a sweat uric acid and glucose sensor based on a carbon nanotube (CNT) enhanced electrochemical platform, and aims to solve the sensitivity challenge of low-concentration biomarker detection in sweat. The enzyme is covalently immobilized on the CNT through an EDC / NHS chemical method, so that the catalytic efficiency, the electron transfer speed and the sensor stability are remarkably improved, and the ultralow detection lower limit of uric acid and glucose is realized. According to the device, uric acid, glucose and pH sensing functions are integrated on a single wearable platform, efficient flowing and rapid updating of sweat are ensured through a radiation symmetry microfluid design optimized through finite element analysis, and real-time biomarker monitoring is supported. The material innovation (such as CNT-enzyme complex) and fluid dynamics optimization of the invention overcome the key problem in the field of wearable biosensing, and provide an extensible solution for the next generation of non-invasive health monitoring.

The invention discloses a ruthenium and samarium double monatomic doped three-dimensional titanium-based tin antimony nickel electrode and a preparation method and application thereof. The preparation method of the electrode comprises the following steps: (1) pretreating the titanium felt; (2) preparing a sol impregnation liquid; (3) sol coating and drying: dipping the pretreated titanium felt in the prepared sol dipping liquid, fully adsorbing and then drying to form a uniform precursor layer; and (4) roasting treatment is conducted, specifically, the dried titanium felt is placed in a muffle furnace to be roasted, and then the steps of dipping, drying and roasting are repeated till the final ruthenium and samarium double monatomic doped three-dimensional titanium-based tin-antimony-nickel electrode is obtained. In the prepared electrocatalyst, ruthenium and samarium are doped into a tin-antimony-nickel electrode in a monatomic form, the utilization efficiency of ruthenium and samarium atoms is improved, and the electrode is endowed with excellent electrocatalytic activity. The unique three-dimensional structure and double-monatomic doping significantly enhance the electron transfer rate and the reaction kinetic characteristics, so that the electrode shows excellent stability and efficient hypochlorous acid generation ability.

The invention provides a formate dehydrogenase mutant with improved electron transfer rate and application thereof, the formate dehydrogenase mutant takes an amino acid sequence as shown in SEQ ID NO.1 or an amino acid sequence having at least 80%, 85%, 90%, 95%, 97%, 98% or 99% identity with the SEQ ID NO.1 as a parent, and has site-saturated mutation corresponding to tyrosine at the 262nd site of the SEQ ID NO.1. The TsFDH mutant with improved electron transfer rate and stable catalytic activity is finally obtained by performing site-directed saturated mutation on formate dehydrogenase from thiobacillus.

The invention relates to the technical field of soil improvement, and discloses a carbon-based material as well as a preparation method and application thereof. The carbon-based material is electron shuttle modified lignin. According to the carbon-based material provided by the invention, the lignin is subjected to surface modification by using the electron shuttle, the lignin is rich in resource, easily available in raw material, low in cost, good in stability and harmless, and high electron shuttle activity fragments are introduced on the surface by combining with the electron shuttle, so that the electron shuttle capability is greatly improved; the carbon-based material has the capability of promoting reduction and dissolution of soil minerals, and can be applied to soil improvement, improvement of electron transfer rate between microorganisms and minerals, acceleration of mineral dissolution and activation of soil mineral elements, effective regulation and control of soil iron circulation process so as to improve soil trophism, and guarantee for healthy growth of plants. Compared with a small-molecule shuttle, the shuttle is not easy to deteriorate or lose in the environment, can play a role in soil for a long time, and has great application potential for carbon sequestration and quality improvement of soil and guarantee of crop nutrition.

The invention relates to the technical field of photocatalysis, in particular to a Ni / Ga bimetal doped g-C3N4 nanotube composite material as well as a preparation method and application thereof. The Ni / Ga bimetal doped g-C3N4 nanotube composite material with the nitrogen vacancy is formed by doping Ni and Ga bimetals into the g-C3N4 nanotube and calcining the g-C3N4 nanotube in the air atmosphere to introduce the nitrogen vacancy. Nitrogen vacancies and double metal doping synergistically improve the efficiency of photocatalytic hydrogen production, because the Ni / Ga double metal doped g-C3N4 nanotube composite material with the nitrogen vacancies has a wider visible light absorption range, a lower carrier recombination rate, a higher electron transfer rate and higher stability, the composite material further has higher hydrogen production efficiency.

The invention provides a dendrobium officinale dynamic cultivation method based on Internet of Things edge calculation and mixed digital twinning, and belongs to the technical field of computer and bioengineering. The method comprises the steps of hyperspectral data acquisition, environmental parameter acquisition, construction of a 3D convolutional neural network for predicting an electron transfer rate J, construction of a hybrid digital twinborn model, fusion, environmental control and the like. According to the method for environment control, cross-climate zone experiments show that the yield can be increased by 23.6%, the polysaccharide content is increased by 18.8%, and the survival rate is increased by 15.1%; a reproducible technical framework is provided for intelligent upgrading of precision agriculture, and the application prospect is good.

The invention belongs to the technical field of positive electrode active materials, and particularly relates to nano single crystal lithium iron phosphate as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out ball milling on a mixture containing a lithium source, an iron source and a phosphorus source in a supercritical fluid, and carrying out roasting, impurity removal and drying treatment to obtain lithium iron phosphate, and dispersing the lithium iron phosphate in glycerol, and sintering to obtain the nano single crystal lithium iron phosphate. According to the preparation method of the nano single crystal lithium iron phosphate, a supercritical fluid technology and secondary sintering are combined, so that carbon coating on the surface of the lithium iron phosphate is uniform, the grain size of lithium iron phosphate grains is refined, and the electron transmission rate and the cycling stability of the lithium iron phosphate are further improved.

The invention provides a black TiO2 nanosheet (at) Pt nanoparticle photoelectric catalyst and a preparation method and application thereof in methane photoelectric catalytic conversion, black TiO2 is prepared by introducing surface defects (such as oxygen vacancies) so as to expand the visible light response range of the black TiO2, and the surface of the black TiO2 is modified by precious metal nanoparticles (such as Pt), so that the visible light response range of the black TiO2 is expanded. While the photo-induced electron separation is promoted and the catalytic activity is improved, the overall conductivity and the interface electron transfer rate are remarkably improved. Particularly, TiO2 is constructed into an ultrathin two-dimensional nanosheet structure, so that not only can a larger specific surface area and more reaction active sites be provided, but also the diffusion path of photon-generated carriers can be shortened, and the recombination probability can be effectively reduced, thereby further enhancing the photoelectric conversion efficiency. Compared with the prior art, the catalyst provided by the invention has the advantages of ultrathin two-dimensional structure, surface defect regulation and precious metal synergistic modification, and can realize efficient visible light driven photoelectrocatalytic methane conversion.

The invention discloses a negative electrode electrolyte and an acidic tin-bromine flow battery, and belongs to the technical field of energy storage. The negative electrode electrolyte provided by the invention comprises an active substance and a supporting electrolyte, the active substance comprises tetravalent tin salt; the tetravalent tin salt is selected from at least one of tin tetrachloride, tin sulfate, tin bromide and stannate; the supporting electrolyte is selected from at least one of sulfuric acid, hydrochloric acid, perchloric acid, methanesulfonic acid, hydrobromic acid and hydriodic acid. According to the acidic tin-bromine flow battery provided by the invention, a proper tin ion ligand is selected in the negative electrode electrolyte, and the formed tin-based complex can effectively improve the redox kinetics of Sn < 4 + > / Sn < 2 + > and improve the efficiency of the tin-bromine flow battery. Besides, the modification of the negative electrode can further improve the adsorption of reactive active substances and improve the electron transfer rate, and the high specific surface area can provide more active sites, so that the reaction polarization is reduced and the battery performance is improved.

The invention discloses a hydroxyproline rapid detection molecularly imprinted electrochemical sensor as well as preparation and application thereof, and relates to the field of quality safety monitoring of medicinal plants. The preparation method of the molecularly imprinted electrochemical sensor comprises the following steps: preparing the Fc-MWCNTs composite material, preparing the Fc-MWCNTs / GCE, and preparing the molecularly imprinted electrochemical sensor MIP-Fc-MWCNTs (at) GCE. According to the invention, MWCNTs with good conductivity and Fc which has good stability and oxidation-reduction property and is used as an excellent electron transfer medium are used as electrode substrate materials; and the Fc-MWCNTs and the MWCNTs are covalently bonded through an amide reaction to prepare the composite material Fc-MWCNTs which has excellent electron transfer medium characteristics, low potential reproducibility and strong stability and can remarkably improve the electron transfer rate between the electrode surface and an electrolyte. The modified composite material Fc-MWCNTs is modified on the surface of GCE, so that the molecularly imprinted electrochemical sensor MIP-Fc-MWCNTs (at) GCE with high sensitivity, high selective recognition and fast detection is constructed, and the molecularly imprinted electrochemical sensor is used for detecting an index component Hyp of cornu cervi pantotrichum.

The invention provides a sewage deep denitrification method and equipment based on polysulfide-assisted activated sludge, and relates to the technical field of sewage treatment. Activated sludge is inoculated into a fluidized bed reactor to serve as a biological denitrification flora; the polysulfide agent and the nitrogen-containing wastewater to be treated respectively flow into the fluidized bed reactor from the bottom of the fluidized bed reactor through peristaltic pumps; operating the fluidized bed reactor to perform sewage denitrification, wherein the activated sludge in the fluidized bed reactor is in a fluidized state; and after water is discharged from the fluidized bed reactor, calcium salt is added for SO4 < 2-> removal control. The technical problems of limited electron transfer rate and easy generation of by-product pollution caused by taking an organic carbon source or elemental sulfur as an electron donor in the prior art are solved, and the technical effects of improving the denitrification performance, effectively controlling the generation of by-products and improving the environmental protection benefit are achieved.

The invention relates to sludge-based nano biochar as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing iron-containing excess sludge into a suspension, adjusting the pH value to 2-8, heating and hydrolyzing at 40-150 DEG C, collecting solids, drying and grinding to obtain sludge fine powder; calcining in an N2 atmosphere to obtain charcoal powder; the charcoal powder is subjected to acid pickling, and acidified charcoal is obtained; mixing and reacting with hydrogen peroxide in proportion, centrifuging to take supernate, and filtering to obtain a nano biochar solution; and purifying and drying the nano-biochar solution to prepare nano-biochar powder. The particle size of the nano biochar is 1t; the molar percentage content of the oxygen element is 15%-50%; the width of lattice fringes is 0.22 nm, and the total content of heavy metals is lower than 0.05%. The sludge-based nano biochar provided by the invention has good conductivity, oxidation-reduction property and low biotoxicity, and can simultaneously accelerate the extracellular electron transfer effect and intracellular electron transfer rate of microorganisms and improve the biological denitrification efficiency.

The invention provides an aerobic composting method and application of reservoir blue-green algae and reed straws, the reservoir blue-green algae, reed straws and the like are used as raw materials, a thermophilic microbial agent is used for performing aerobic composting treatment on the raw materials, and a nano zero-valent iron / biochar composite material is added, so that the aerobic composting effect is achieved. By using the material, the electron transfer rate between microbial species in an aerobic composting system is increased, H2S and other foul gases released in the composting process are efficiently reduced, and the odor emission intensity is effectively reduced while the decomposition speed of organic matters in the aerobic composting process of organic wastes is increased.

The invention discloses a sulfur-loaded lamellar niobium oxide / niobium nitride-biomass derived porous carbon composite electrode material as well as a preparation method and application thereof, and belongs to the technical field of preparation methods of lithium-sulfur battery electrode materials, the method comprises the following steps: dispersing biomass derived porous carbon in an ethylene glycol solution dissolved with niobium pentachloride, and sequentially performing hydrothermal reaction to obtain the sulfur-loaded lamellar niobium oxide / niobium nitride-biomass derived porous carbon composite electrode material. The preparation method comprises the following steps: firstly, preparing a porous carbon composite material, calcining the porous carbon composite material, performing calcination reaction on the porous carbon composite material and melamine at the same time, finally mixing the porous carbon composite material with elemental sulfur, and performing heat treatment to obtain the sulfur-loaded lamellar niobium oxide / niobium nitride-biomass derived porous carbon composite electrode material. Lamellar niobium oxide / niobium nitride is utilized to increase polysulfide adsorption and catalytic conversion sites, a built-in electric field generated by constructing a niobium-based heterojunction is utilized to promote the electron transfer rate in the polysulfide conversion process, the electrode reaction kinetics is accelerated, and biomass derived porous carbon is utilized to improve the matrix conductivity and inhibit the shuttle effect of polysulfide, so that the conversion efficiency of the polysulfide is improved. The cycle performance and the service life of the lithium-sulfur battery are synergistically improved.

The present application relates to a kind of trace nitrogen oxide reinforced UVB / high iodate degradation flame retardant intermediate method, comprising the following steps: respectively, an appropriate amount of high iodate and ACNHTEMPO are sequentially added into DOPO containing wastewater, the pH of mixed solution is adjusted with phosphate buffer solution, after being fully stirred, UV irradiation is carried out for a period of time, the degradation of organic phosphorus flame retardant intermediate DOPO can be realized.The present application method utilizes potassium periodate under the irradiation of ultraviolet light, activates ACNHTEMPO to speed up electron transfer rate, substantially improves the degradation efficiency of pollutant, and the pH is widely applicable.Solve the defect that most advanced oxidation technology needs to be carried out in acidic conditions;In addition, the present method is simple to operate, uses trace activator, does not produce secondary pollution, can provide new perspective for organic wastewater treatment field.

The application discloses a kind of gold nanoparticle loaded oxygen-doped ultrathin porous boron nitride film electrode and preparation method thereof, the preparation method includes the following steps: according to mass ratio 1:3-6:0.25-0.35, boric acid, urea, oxalic acid is prepared oxygen-doped ultrathin porous boron nitride, then gold nanoparticle is loaded oxygen-doped ultrathin porous boron nitride and coated on conductive substrate to form film electrode.The oxygen-doped ultrathin porous boron nitride film electrode loaded with gold nanoparticles prepared by the application has the advantages of large specific surface area, high electron-hole separation efficiency, fast electron transfer rate, etc., is a new type of film electrode with excellent photoelectric performance, meets the actual production demand, and has wide application prospect in photoelectrochemical field.The preparation method also has the advantages of simple process, easy operation, high preparation efficiency and low cost, and is suitable for large-scale preparation, which is beneficial to industrial application.

The invention belongs to the technical field of underground water pollution remediation functional catalytic materials and water treatment, and particularly relates to a modified iron heterojunction biomass slow-release material, a preparation method thereof and application of a coupled electric field in underground water organic pollutant remediation. The mushroom biochar is used as a carrier to load the modified zero-valent iron, so that the problem of iron agglomeration is effectively relieved; and the modified zero-valent iron grows in the three-dimensional pore channel of the charcoal in situ, so that the slow release of the iron active component can be realized, and the utilization efficiency of the oxidizing agent is improved. An electric field is built in the iron-carbon structure reinforcing material, so that the problem of slow mass transfer in an underground water medium is solved, and the surface accessibility of an oxidizing agent and pollutants is improved. The material not only can reduce the invalid consumption of an oxidizing agent caused by overhigh local Fe < 2 + > concentration, but also can drive directional electron migration through an electric field, realizes space-time matching and dynamic regulation and control of an electron transfer rate and an iron supply rate, forms an in-situ regeneration closed-loop system, and has a good application prospect in groundwater remediation.

The present invention belongs to the technical field of positive electrode active materials, and specifically relates to a nano single crystal lithium iron phosphate and its preparation method and application. The preparation method comprises the following steps: after ball milling a mixture containing a lithium source, an iron source and a phosphorus source in a supercritical fluid, roasting, removing impurities and drying to obtain lithium iron phosphate; after dispersing the lithium iron phosphate in propylene glycol and sintering, a nano single crystal lithium iron phosphate is obtained. The preparation method of the nano single crystal lithium iron phosphate of the present invention combines supercritical fluid technology with secondary sintering, so that the carbon coating on the surface of the lithium iron phosphate is uniform and the grain size of the lithium iron phosphate is refined, thereby improving the electron transmission rate and cycle stability of the lithium iron phosphate.

The present disclosure belongs to the technical field of batteries, and provides a composite lithium iron phosphate material, and a preparation method therefor and the use thereof. The composite lithium iron phosphate material comprises a lithium iron phosphate core and a shell, wherein the shell comprises an MXene material such as Ti3C2, and a semiconductor block polymer such as P3HT-PE. The MXene material having metal properties and the semiconductor block polymer are introduced and mixed, and jointly coat lithium iron phosphate, thereby forming a Schottky junction at a position where the MXene material is in close contact with the semiconductor block polymer, such that the directional movement of electrons can be promoted and the electron transfer rate can be increased; and the block polymer has certain tensile properties, and thus can not only tightly coat the lithium iron phosphate, but also does not easily fall off during long-time charging and discharging.

The invention belongs to the technical field of microbial fuel cells, and relates to preparation of a functional lignin-based biomass charcoal electrode prepared by flash evaporation Joule heat and performance research of the functional lignin-based biomass charcoal electrode. The lignin-based biomass material is subjected to one-step carbonization and functionalization by using a flash evaporation Joule heat technology. According to the preparation method, recycling of biomass waste and preparation of the microbial fuel cell anode are rapidly and efficiently completed, and the extracellular electron transfer rate between the material and microorganisms is effectively promoted through biocompatibility and capacitive performance of the microbial fuel cell anode. The method comprises the following steps: S1, preparing and pretreating ganoderma lucidum mushroom residues; s2, carrying out hydrothermal reaction on the treated ganoderma lucidum mushroom bran, and pre-carbonizing to obtain mushroom bran water carbon; s3, mixing mushroom bran water carbon and ferrocobalt metal salt in equal proportion to obtain a flash evaporation Joule heat precursor; s4, carrying out flash Joule heat treatment on the precursor to obtain ferrocobalt doped mushroom bran graphene; s5, preparing the cobalt-iron doped graphene as an anode material and assembling the microbial fuel cell; compared with an existing microbial fuel cell anode preparation method, the method has the advantages that recycling of lignin biomass waste and preparation of the microbial fuel cell anode are rapidly and efficiently completed, and the extracellular electron transfer rate between the material and microorganisms is effectively promoted through biocompatibility and capacitive performance of the lignin biomass waste.

The invention discloses a preparation method of an MXene-based electro-polymerization molecularly imprinted polymer and application of the MXene-based electro-polymerization molecularly imprinted polymer in detection of sulfadimethoxine content. The preparation method comprises the steps of synthesis of an MXene-MOF composite material, preparation of the MXene-based electro-polymerization molecularly imprinted polymer and the like. The electrochemical detection of the SDM is realized by electrically polymerizing a layer of molecularly imprinted polymer on the surface of the MXene-based composite material. When SDM exists in a detection environment, an imprinting cavity with specific recognition capability is combined with the SDM through acting forces such as hydrogen bonds and the like, so that the electron transfer rate is hindered, and the current value is reduced. The quantitative detection of the SDM is realized by analyzing the relationship between the logarithm of the concentration of the SDM and the delta I current change value. The method has a wide concentration detection range and a low detection limit, and has a wide application prospect.

The application discloses a kind of garden plant health condition detection and early warning system based on spectral analysis, including adjustable frequency excitation light source, fluorescence detector, quadrature phase-locked demodulation module, phase frequency characteristic analysis module, early warning control unit and early warning output terminal, adjustable frequency excitation light source emits broadband sweep frequency modulation perturbation excitation light, quadrature phase-locked demodulation module executes operation filtering natural background stray light to the electric signal collected, phase frequency characteristic analysis module extracts characteristic relaxation frequency parameter when absolute phase delay parameter reaches forty-five degrees phase angle, early warning control unit sends instruction lock frequency and applies saturated light flash pulse, system calculates dynamic apparent electron transfer rate parameter, and according to temperature drift compensation baseline, executes double tolerance threshold comparison determination plant physiological stress state.The application avoids the defect of detection frequency band misplacement, eliminates the interference of strong background light and air temperature fluctuation, realizes the multi-dimensional joint early warning of early physiological stress.

The invention discloses an electrode material which is simple in preparation method, high in performance and capable of stably producing hydrogen by electrolyzing water, and also discloses a preparation method of a photocatalyst for purifying wastewater by using a derivative of the electrode material. The preparation method of the electrocatalyst mainly comprises the following steps: etching a nickel metal substrate by using diluted hydrochloric acid; the preparation method comprises the following steps: preparing a first-stage product, dissolving the first-stage product with a bismuth source and molybdate in a reaction kettle, carrying out hydrothermal synthesis to obtain a hydrothermal product, carrying out high-temperature calcination on the obtained material to obtain a sample precursor and a part of byproducts, finally repeating the reaction once to obtain a high-activity electrode and related byproduct derivatives, mixing the two byproducts, carrying out high-temperature calcination, and grinding to obtain a second-stage product. According to the prepared catalyst, a bismuth source is introduced to serve as an additive, a NiMoO4 / Fe2 (MoO4) 3 composite film layer active phase is constructed on an NF substrate through a one-step hydrothermal-corrosion-growth method, the active phase and an NF framework are induced through a confinement effect to form strong interface bonding, the electron transfer rate is increased, and the electrode performance is remarkably improved by reducing the valence band position of the active phase. The preparation process is simple to operate, the morphology of the catalyst is controllable, and derived by-products generate higher economic benefits.

The invention belongs to the field of metal ion battery material synthesis, and particularly provides a sulfur-doped oxygen-nitrogen-enriched conjugated organic material and application thereof in Li < + > / Zn < 2 + > ion batteries. The preparation method comprises the following steps: firstly, preparing 2, 3, 8, 9, 14, 15-hexachlorodiquinoline [2, 3-a: 2 ', 3'-c] phenazine (HANT-Cl) by taking cyclohexanehexone and dichlorobenzene diamine as raw materials, and then synthesizing 6S6O and the derivative thereof by taking HATN-Cl, sodium sulfide nonahydrate and a naphthoquinone derivative as raw materials. The obtained electrode material contains a plurality of oxidation-reduction active sites, multi-electron storage can be carried out, the transfer rate of electrons is improved through the large pi conjugated structure of the conjugated quinoneazine material, and therefore the high theoretical specific capacity and the excellent rate performance are achieved. Due to the addition of the sulfur element, the oxidation-reduction potential of the material is improved, the energy density of a battery can be improved, and the material has a wide application prospect in a Li < + > / Zn < 2 + > ion battery system.

The invention belongs to the technical field of sludge treatment and recycling, and particularly relates to a method for promoting anaerobic methane production of sludge through signal molecule reinforced biochar. Comprising the following steps: cleaning, drying, grinding and screening a biochar material to obtain biochar particles; carrying out sedimentation, sieving and thermal pretreatment on the residual sludge to obtain pretreated sludge; mixing the pretreated sludge with the inoculated sludge to obtain mixed sludge; the method comprises the following steps: adding charcoal particles, signal molecules and mixed sludge into an anaerobic reactor, carrying out nitrogen aeration on the anaerobic reactor, sealing the anaerobic reactor in a water bath constant-temperature oscillator, and carrying out methane production until no methane is generated in the anaerobic reactor; the signal molecule is AHLs; the invention solves the problems of low electron transfer rate, long lag time of the anaerobic digestion system and the like in the traditional anaerobic digestion system in the prior art.

The invention provides a preparation method of an electrochemical biosensor based on a molecular imprinting track etching film, and belongs to the field of electrochemical biosensing analysis. The electrochemical biosensor based on the molecularly imprinted track etching film is formed by taking a track etching film modified working electrode as a substrate, taking graphene oxide as an electric signal amplification material and taking a molecularly imprinted polymer with a template molecularly imprinted cavity as a specific recognition element. When the mixed solution contains a target object, target molecules are captured by an imprinting cavity on the molecular imprinting layer according to specific interaction, so that a nano pore channel is blocked, the electron transfer rate in a system is reduced due to the increase of steric hindrance, and the ultrasensitive quantitative detection of the target molecules is realized. The method has very important theoretical and practical significance in the field of medical diagnosis, and a new direction is provided for application of the track etching film in the field of analysis and detection.

The present invention relates to the technical field of electrocatalytic materials, and in particular to an OER electrocatalyst and a preparation method thereof, the preparation method comprising: adding an iron salt, a nickel salt, a nitrogen source and a foam nickel substrate to water to obtain a mixed solution; reacting the mixed solution under preset temperature conditions to obtain a precursor; and sulfurizing the precursor to obtain the OER electrocatalyst. In the present invention, the precursor with a nanoflower morphology formed in the hydrothermal process still retains the morphological characteristics of the nanoflowers in the high-temperature sulfurization process, which allows enough active sites to be fully exposed. The heterogeneous interface (Fe3S4 / Ni(OH)2) in the electrocatalyst has a synergistic effect, which improves the charge distribution on the catalyst surface, accelerates the electron transfer rate, and effectively improves the OER catalytic activity. In the stability test under high current density, the Fe3S4 / Ni(OH)2 / NF catalyst also showed excellent long-term stability. At a current density of 100mA cm ‑2 It can work stably for 100 hours.